private boolean append(Object k, Object v, boolean sep) throws IOException {
if (k == null) throw new IllegalArgumentException(ERR_NULL_KEY);
if (v == null) return false;
String key = k.toString();
if (jay.include(key)) {
if (sep) w.write(',');
w.write('"');
w.write(jay.mapToJson(key));
w.write('"');
w.write(':');
appendValue(v);
return true;
}
return false;
}
private void appendValue(Object o) throws IOException {
if (o == null) {
w.write("null");
} else {
o = jay.adaptToJson(o);
if (o instanceof Boolean) w.write(o.toString());
else if (o instanceof Number) w.write(o.toString());
else if (o instanceof String) appendEscaped(o.toString());
else if (o instanceof Character) appendEscaped(o.toString());
else if (o instanceof Date) w.write(Long.toString(((Date) o).getTime()));
else if (o instanceof Map) append('{', ((Map<?, ?>) o).entrySet(), '}');
else if (o instanceof Iterable) append('[', (Iterable<?>) o, ']');
else if (o.getClass().isArray()) appendArray(o);
else if (isSystem(o)) appendEscaped(o.toString());
else appendModel(o);
}
}